Soy Protein vs Whey Protein
Soy protein vs whey protein. These two popular proteins are continually being evaluated. This has become a special area of interest with more protein intake being advocated for weight loss in many popular diet books.
When you examine soy protein vs. whey protein you find both similarities and differences in the two.
Similarities
- Reduced risk of certain cancers.
- Potential to lower cholesterol and reduce the risk of cardiovascular disease.
- Both have PDCAAS (Protein Digestibility Corrected Amino Acid Score) scores of 1.0. This is the highest score for protein quality.
- Enhanced muscle development.
- Promotes stronger bones.
Differences
- Soy is less expensive. Both process for making whey are more expensive.
- Soy may have more capacity to strengthen the immune system.
- Soy protein has twice the amount of glutamine and arginine as whey protein.
- Whey has 20 percent branched chain amino acids while soy has 18 percent.
- Soy may be easier on the kidneys.
- Soy may interfere with thyroid function for some people in high doeses.
- Whey is a nutritionally complete protein. It provides immunoglobulins and lactoferrin that support the immune system.
- Whey typically has a more neutral taste.
- Soy protein contains isoflavones that are being studied for possible hormonal effects.
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